Re: [Linux-kernel-mentees] [PATCH v2] PCI: Remove functions not called in include/linux/pci.h

From: Kelsey Skunberg
Date: Mon Jul 15 2019 - 16:19:50 EST


On Mon, Jul 15, 2019 at 09:42:47PM +0200, Lukas Bulwahn wrote:
>
>
> On Mon, 15 Jul 2019, Kelsey Skunberg wrote:
>
> > Remove the following uncalled functions from include/linux/pci.h:
> >
> > pci_block_cfg_access()
> > pci_block_cfg_access_in_atomic()
> > pci_unblock_cfg_access()
> >
> > Functions were added in patch fb51ccbf217c "PCI: Rework config space
> > blocking services", though no callers were added. Code continues to be
> > unused and should be removed.
> >
> > Signed-off-by: Kelsey Skunberg <skunberg.kelsey@xxxxxxxxx>
> > ---
> >
>
> Nice finding. How did you discover this issue? Did you use a tool to find
> this ununsed code or stumble over it during your code review?
>
Stumbled upon it while reviewing include/linux/pci.h to see what
could be moved to drivers/pci/pci.h.

> Also note that commits are referred to with this format:
>
> commit <12-character sha prefix> ("<commit message>")
>
> So, you need to change patch to commit and include brackets around your
> quoted commit message.
>
> Lukas

Thank you for letting me know and reviewing! I will update this now.

-Kelsey

>
> > Changes since v1:
> > - Fixed Signed-off-by line to show full name
> >
> > include/linux/pci.h | 5 -----
> > 1 file changed, 5 deletions(-)
> >
> > diff --git a/include/linux/pci.h b/include/linux/pci.h
> > index cf380544c700..3c9ba6133bea 100644
> > --- a/include/linux/pci.h
> > +++ b/include/linux/pci.h
> > @@ -1656,11 +1656,6 @@ static inline void pci_release_regions(struct pci_dev *dev) { }
> >
> > static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
> >
> > -static inline void pci_block_cfg_access(struct pci_dev *dev) { }
> > -static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
> > -{ return 0; }
> > -static inline void pci_unblock_cfg_access(struct pci_dev *dev) { }
> > -
> > static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
> > { return NULL; }
> > static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
> > --
> > 2.20.1
> >
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> >